(sin^2 a - cos^2 b )/( cos^2 a - cos^2 b ) = cot (a + b) / tan (a - b)

Aformual for 8 bottles of window cleaner calls for 6 cups of rubbing to customers alcohol 2 1/4 gallons of water and 1 1/2 cups of ammonia alcohol would the forula call if a factory made 1,280 bottles for stores to sell to customers

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

Which point-slope form equation represents a line that passes through (3,-2) with a slope of -4/5